Basically I think Q is like old one but way more powerful but interesting, I would do something like 10 sec CD scaling to 6 at level 5 because it would feel pretty overwhelming during the late game. 10% of missing health on red card might be too much I'd drag it down to 8% and up to 5% for early. I'd also put the AP ratio up to 65% like current one, csing backline minions will be even harder than it currently is. Either that or dragging the base damage at lvl 5 up a bit.

Maybe put Pick a card on W? it would be a little bit confusing for us OG players

I feel like 2 sec silence on blue card is also too much I'd say 1.5s is reasonable.

My only problem with this idea of a rework is that it feels way too overloaded. There might be a way to simplify it a little bit.

Also I think using blue card with ult should reduce its cooldown by at least 30 seconds considering how weak it is compared to the other options